KR20020081951A - A Getter Structure For The Cathode Ray Tube - Google Patents

Abstract

PURPOSE: A getter structure for a cathode ray tube is provided to remove a bending phenomenon of a getter structure in an RF induction heating process by changing a shape of a getter structure. CONSTITUTION: A getter support body(10) is used for forming a getter structure by connecting a getter ring(11) with a getter spring(13). The getter ring(11) is used for storing a getter material. The getter spring(13) is fixed to an anode button of a funnel. The getter support body(10) has a twist structure instead of an existing rectangular structure in order to increase intensity. A bending phenomenon of the getter support body(10) is prevented form an RF induction heating process for barium as getter material. In addition, a concave structure can be formed on the getter support body(10) in order to prevent the bending phenomenon of the getter support body(10) due to the RF induction heating process.

Description

Getter Structure For The Cathode Ray Tube

The present invention relates to a cathode ray tube, and more particularly, a shape of a getter structure is changed so that a getter structure according to the prior art does not bend the getter support (supporter) of the getter structure even by high frequency induction heating during getter pressing. It relates to a getter structure.

1 is a longitudinal cross-sectional view showing a general flat color cathode ray tube, in which the inside of the flat color CRT is divided into various parts, namely, a panel 1 in the form of a flat plate, and three colors R, G, and B on the inner side of the panel 1; The fluorescent film 5 is fused by frit glass to the rear end of the panel 1, and the inside of the funnel 2 is kept in a high vacuum state, and is enclosed in the neck portion of the funnel 2 to emit an electron beam toward the fluorescent film side. The emitting electron gun 4 and the shadow mask 3 which is provided in close proximity to the fluorescent film 5 and serves as the color discrimination of the electron beam emitted from the electron gun 4 are mounted.

As shown in Fig. 2, a getter structure 8, which is used to maintain the degree of vacuum inside the CRT, is mounted inside the funnel 2. As shown in Figs. As shown in FIG. 3, the getter structure 8 includes a getter ring 11 in which a getter material is stored, a getter spring 13 for coupling and fixing to the anode button 6 of the funnel 2, It is composed of a getter support 10 for connecting the getter ring 11 and the getter spring 13, the back of the getter ring 11 is in contact with the internal graphite (7) coated on the funnel (2) ( 12), the front part of the getter ring consists of a deflector 9 for adjusting the angle at which the getter material is scattered when it is scattered by high frequency induction heating.

In general, during the manufacturing process of the cathode ray tube, when the electron gun is inserted into the neck portion and the sealing is completed, the evacuation process is performed to make the inside of the cathode ray tube high vacuum to make the vacuum degree about 5 * 10 ^-6 Torr.

In general, the exhaust process is to improve the vacuum degree by exhausting the mechanical method, but since many parts are built in the cathode ray tube, since residual gas is generated continuously during operation, there is a limit in obtaining the desired vacuum degree only by mechanical exhaust. The getter is used as a way to maintain the vacuum by always removing the residual gas. In other words, when the exhaust gas inside the cathode ray tube is exhausted, the getter structure is subjected to high frequency induction heating to scatter the getter material. At this time, barium, a scattered getter material, chemically adsorbs the residual gas in the cathode ray tube and is attached to the inner wall of the cathode ray tube to improve the degree of vacuum. This operation is called a getter flash operation.

Referring to the shape of the getter structure 8 according to the prior art as shown in Figs. 4A to 4C, the getter ring 1 and the funnel 2 in which the getter material is stored are fixed to the anodized button 6. The getter spring 13 is connected by the getter support 10, which is a thin rectangular structure, to form the getter structure 8.

The getter structure 8 having such a structure scatters the getter material and performs a getter pressing operation to maintain the inside of the cathode ray tube at a high vacuum, wherein the getter support 10 having a thin rectangular structure performs high frequency induction heating. I can't stand it and I get bent.

If the getter support 10 is bent before the getter material is scattered, the scattering position of the getter material considered in the design may be distorted due to the bending of the getter support 10 so that the getter material may not be evenly scattered inside the cathode ray tube. Concentration and scattering of a part of the shadow mask 3 causes the aggregation of barium, a getter material, to fail to adsorb residual gas spread in the cathode ray tube, resulting in poor vacuum and discoloration of the shadow mask 3. The problem arises that (3) becomes vulnerable to thermal deformation.

The present invention solves the problem that the getter structure of the getter structure is bent when the getter structure is bent in high frequency induction heating by changing the shape of the getter structure in order to solve the problems of the prior art. The purpose of the present invention is to eliminate thermal deformation defects of the mask and to improve screen characteristics due to even scattering of barium.

1 is a cross-sectional view for explaining the structure of a general flat cathode ray tube,

2 is a view showing a state in which a getter structure is fixed to a conventional funnel;

3 shows a getter position in a typical cathode ray tube;

4 is a view showing a conventional getter structure shape;

5 is a view showing a getter structure shape according to the present invention, and

6 is a view showing a getter structure shape according to another embodiment of the present invention.

*** Explanation of symbols for main parts of drawings ***

1: panel 2: funnel

3: shadow mask 4: electron gun

5: fluorescent surface 6: anodized button

7: built graphite 8: getter structure

9: deflector 10: getter support

11: getter ring 12: cross bar

13: getter spring 14: rail

Technical means for solving the object of the present invention, the outer surface consisting of a panel formed with a fluorescent surface on the inner surface, a funnel fused to the panel and a neck portion for mounting an electron gun therein, and inserting an electron gun in the neck portion of the envelope In the cathode ray tube comprising a getter structure mounted inside the funnel for increasing the degree of vacuum of the exhaust and sealed envelope, the getter structure is coupled to the getter ring in which the getter material is stored, the anode button portion of the funnel It is composed of a getter spring for fixing, and a getter support connecting the getter ring and the getter spring to each other, wherein the getter support has a twisted structure.

In addition, the getter support is a cathode ray tube, characterized in that having a concave or convex bending structure with respect to the extension line connecting the getter ring and the getter spring.

Another technical solution of the present invention is an enclosure consisting of a panel having a fluorescent surface formed on its inner surface, a funnel fused to the panel, and a neck portion for mounting an electron gun therein, and an electron gun inserted into the neck portion of the envelope to exhaust and seal it. A cathode ray tube including a getter structure mounted inside a funnel for increasing the degree of vacuum of an envelope, wherein the getter structure includes a getter ring in which a getter material is stored, and a getter ring for fixing and fixing to an enwood button portion of the funnel. And a getter support connecting the getter ring and the getter spring to each other, wherein the getter support has a concave or convex bending structure with respect to an extension line connecting the getter ring and the getter spring.

Hereinafter, the configuration and operation according to the present invention in more detail.

As shown in FIGS. 5A and 5B, the getter structure 11 is connected to each other by connecting the getter ring 11 in which the getter material is stored and the getter spring 13 for fastening to the anode button 6 of the funnel 2. By increasing the shape of the getter support 10 used to achieve the shape from the square structure of the thin plate according to the prior art to the twist structure according to the present invention, the strength is increased 2-3 times compared to the square structure of the thin plate according to the prior art. It is possible to prevent the getter support 10 from bending when the barium, which is a getter material, is scattered inside the cathode ray tube by high frequency induction heating.

Also, as another embodiment of the present invention, as shown in FIG. 6, the part of the getter support 10 positioned between the getter ring 11 and the getter spring 13 may be obtained by the high frequency induction heating during getter pressing. ) Is formed in the getter support 10 to form a concave or convex bending structure, that is, a U-shaped structure, to prevent bending. Of course, forming the aforementioned U-shaped structure on the twisted getter support 10 as shown in Figs. 5A and 5B can provide better results.

As described above, the getter ring 11 in which the getter material is stored and the getter spring 13 for coupling to the anode button 6 of the funnel 2 are connected to each other to form a getter structure 8. The shape of the getter support 10 is a portion of the getter support 10 positioned between the twist structure and the getter ring 11 and the getter spring 13 according to the present invention in a direction in which the getter support 10 is bent. When the getter support 10 can be increased by at least five times as compared with the thin plate rectangular structure according to the prior art, the getter support 10 can be scattered inside the cathode ray tube by high frequency induction heating. The getter support 10 can be completely prevented from bending.

In addition, by uniformly scattering the barium as a getter material in the cathode tube in the design direction, the residual gas in the cathode ray tube is uniformly adsorbed and attached to the inner wall of the cathode ray tube, thereby improving the degree of vacuum.

In particular, the barium does not occur due to the evenly scattered barium on the front of the shadow mask 3 so that the problem of weakening of thermal deformation of the shadow mask does not occur and the barium is evenly scattered on the front of the screen. The effect of improving the characteristics (luminance) can be obtained, and high quality CRT can be formed.

Claims (3)

A panel formed with a fluorescent surface on the inner surface, a funnel fused to the panel and an envelope including a neck portion for mounting an electron gun therein, and a funnel for increasing the degree of vacuum of the envelope surrounded by an electron gun inserted into the neck of the envelope. In the cathode ray tube comprising a getter structure mounted inside the, The getter structure includes a getter ring in which a getter material is stored, a getter spring for coupling and fixing to an anode button portion of the funnel, and a getter support connecting the getter ring and the getter spring to each other, wherein the getter support is twisted. Cathode ray tube characterized in that it has a structure. The method of claim 1, The getter support is a cathode ray tube, characterized in that having a concave or convex bending structure with respect to the extension line connecting the getter ring and the getter spring. A panel formed with a fluorescent surface on the inner surface, a funnel fused to the panel and an envelope including a neck portion for mounting an electron gun therein, and a funnel for increasing the degree of vacuum of the envelope surrounded by an electron gun inserted into the neck of the envelope. In the cathode ray tube comprising a getter structure mounted inside the, The getter structure is composed of a getter ring in which a getter material is stored, a getter spring for coupling and fixing to an enwood button portion of the funnel, and a getter support connecting the getter ring and the getter spring to each other, wherein the getter support Cathode ray tube having a concave or convex bending structure with respect to the extension line connecting the getter ring and the getter spring.